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PDF The population of the rufa subspecies of the Red Knot (Calidris canutus), which breeds in the central Canadian Arctic and mainly . In August 2006, the red knot (Calidris canutus rufa) was designated a candidate

PDF The population of the rufa subspecies of the Red Knot (Calidris canutus), which breeds in the central Canadian Arctic and mainly winters in Tierra. In August 2006, the red knot (Calidris canutus rufa) was designated a candidate. species for possible addition to the Federal list of endangered and threatened wildlife.

It is a large member of the Calidris sandpipers, second only to the great knot. Six subspecies are recognised.

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Status of the red knot (Calidris canutus rufa) in the western hemisphere

Status of the red knot (Calidris canutus rufa) in the western hemisphere. The population of the rufa subspecies of the Red Knot (Calidris canutus), which breeds in the central Canadian Arctic and mainly winters in Tierra del Fuego, has declined dramatically over the past 20 yr. Previously estimated at 100,000-150,000, the population now numbers 18,000-33,000 (18,000 if just the Tierra del Fuego birds are C. c. rufa, more if the Red Knots of uncertain subspecific status that winter in northern Brazil (7,500) or Florida (7,500) are also C. rufa).

The population of the rufa subspecies, which breeds in the central Canadian Arctic and mainly winters in Tierra del Fuego, has declined dramatically over the last 20 years to between 18 000 and 30 000 birds. Series: Studies in Avian Biology Volume: 36. By: LJ Niles. 185 pages, Figs, tabs, maps.

Hemispheric problems in the conservation of Red Knots (Calidris canutus rufa). Pp. 21-28, in Proceedings of the VI Neotropical Ornithological Congress International Shorebird Symposium, Monterrey, Mexico, October 1999. Western Hemisphere Shorebird Reserve Network, Manomet Centre for Conservation Sciences, Manomet, MA.

Calidris canutus rufa - BioOne

Calidris canutus rufa - BioOne. An overwintering group of Red Knots Calidris canutus. Analysis of Red Knot Calidris canutus rufa banding data in Brazil. ABSTRACT New information indicates that the rufa subspecies of the Red Knot comprises three biogeographically distinct populations wintering in Tierra del Fuego, Maranh√£o and Florida, respectively, and that the roselaari subspecies is largely or wholly confined to the Pacific coast of the Americas on passage and in winter.

Calidris canutus rufa. In the past, genus Calidris was on occasion reserved for present species and C. tenuirostris only. Red Knot (Calidris canutus). In: del Hoyo, . Elliott, . Sargatal, . Christie, . amp; de Juana, E. (ed. Handbook of the Birds of the World Alive. Races islandica, rogersi and, until recently, roselaari formerly included within nominate canutus. Six subspecies currently recognized. Subspecies and Distribution. Lynx Edicions, Barcelona. com/node/53922 on 9 January 2020). 101 videos, 115 photos, 1 sound.

canutus rufa, in the Western Hemisphere (Niles et a.

in the United States. A complementary source of new information on American Red Knot populations is the report of a symposium held during the Third Western Hemisphere Shorebird Meeting at Mazatlan, Mexico, in March 2009 which has been published in the August 2009 issue of the Wader Study Group Bulletin. Moreover, eleven relevant papers, one report and two dissertations have been published during 2008-2009, details of which are presented in the appendix.

Calidris canutus rufa, breeding plumage. Six subspecies are recog. Calidris canutus rufa, breeding plumage.